package com.coolweather.a29199.coolweather;

import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.coolweather.a29199.coolweather.db.City;
import com.coolweather.a29199.coolweather.db.County;
import com.coolweather.a29199.coolweather.db.Province;
import com.coolweather.a29199.coolweather.util.HttpUtil;
import com.coolweather.a29199.coolweather.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragment extends Fragment {

    public static final int LEVEL_PROVINCE=0;
    public static final int LEVEL_CITY=1;
    public static final int LEVEL_COUNTY=2;

    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList=new ArrayList<>();

    private List<Province> provinceList;

    private List<City> cityList;

    private List<County> countyList;

    /**
     * 选中的省份,市，级别
     */
    private Province selectedProvince;
    private City selectedCity;
    private int currentLevel;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE) ;
        View view = inflater.inflate(R.layout.choose_area, container,false);
        titleText = (TextView) view.findViewById(R.id.title_text);
        backButton = (Button) view.findViewById(R.id.back_button) ;
        listView = (ListView) view.findViewById(R.id.list_view);


        Intent intent = new Intent();
        String province = intent.getStringExtra("省");
        String city = intent.getStringExtra("市");
        String county = intent.getStringExtra("县");



        adapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, dataList);
        listView.setAdapter(adapter);
        return view;
       }

    @Override
    public void onActivityCreated( Bundle savedInstanceState) {


        super.onActivityCreated(savedInstanceState);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if(currentLevel == LEVEL_PROVINCE){
                    selectedProvince = provinceList.get(position);
                    queryCities();
                }else if(currentLevel == LEVEL_CITY){
                    selectedCity = cityList.get(position);
                    queryCounties();
                }else if(currentLevel == LEVEL_COUNTY){
                    String weatherId = countyList.get(position).getWeatherId();
                    if(getActivity() instanceof  MainActivity) {
                        Intent intent = new Intent(getActivity(), WeatherActivity.class);
                        intent.putExtra("weather_id", weatherId);
                        startActivity(intent);
                        getActivity().finish();

                    }else if(getActivity() instanceof WeatherActivity) {
                        WeatherActivity activity = (WeatherActivity) getActivity();
                        activity.drawerLayout.closeDrawers();
                        activity.swipeRefresh.setRefreshing(true);
                        activity.requestWeather(weatherId);
                    }
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(currentLevel == LEVEL_COUNTY){
                    queryCities();
                }else if(currentLevel == LEVEL_CITY){
                    queryProvinces();
                }
            }
        });
        queryProvinces();
    }



    /**
     * 查询省，优先数据库
     */
    private void queryProvinces() {
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);//不可见不保留位置
        provinceList = DataSupport.findAll(Province.class);
        if(provinceList.size()>0){
            dataList.clear();
            for(Province province : provinceList){
                dataList.add(province.getProvinceName());

            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        }else{
            String address = "http://guolin.tech/api/china";
            queryFromServer(address,"province");
        }
    }
    /**
     * 查询市，优先数据库
     */
    private void queryCities() {
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);//可见保留位置 INVISIBLE 不可见保留位置
        cityList=DataSupport.where("provinceId = ?",String.valueOf(selectedProvince.getId())).find(City.class);
        if(cityList.size()>0){
            try {
                dataList.clear();
                for (City city : cityList) {
                    dataList.add(city.getCityName());
                }
                adapter.notifyDataSetChanged();
                listView.setSelection(0);
                currentLevel = LEVEL_CITY;
            }catch(NullPointerException e){

                String address = "http://guolin.tech/api/china/";
                queryFromServer(address, "province");
                int provinceCode = selectedProvince.getProvinceCode();
                address = "http://guolin.tech/api/china/" + provinceCode;
                queryFromServer(address,"city");
            }
        }else{
            int provinceCode = selectedProvince.getProvinceCode();
            String address = "http://guolin.tech/api/china/" + provinceCode;

            queryFromServer(address,"city");
        }


    }
    /**
     * 县
     */
    private void queryCounties(){
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityId = ?",String.valueOf(selectedCity.getId())).find(County.class);
        if(countyList.size()>0){
            dataList.clear();
            for(County county : countyList){
                dataList.add(county.getCountyName());

            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        }else{
            int provinceCode = selectedProvince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String address = "http://guolin.tech/api/china/"+ provinceCode + "/" + cityCode;
            queryFromServer(address,"county");
        }
    }
    /**
     * 根据传入的地址和类型从服务器上查询省市县数据
     */
    private void queryFromServer(String address,final String type) {
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(),"加载失败",Toast.LENGTH_SHORT).show();
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
              String responseText = response.body().string();
              boolean result = false;
              if("province".equals(type)){
                  result = Utility.handleProvinceResponse(responseText);

              }else  if("city".equals(type)){
                  result = Utility.handleCityResponse(responseText,selectedProvince.getId());
              }else if("county".equals(type)){
                  result = Utility.handleCountyResponse(responseText,selectedCity.getId());
              }

              if(result){
                  getActivity().runOnUiThread(new Runnable() {
                      @Override
                      public void run() {
                          closeProgressDialog();
                          if("province".equals(type)){
                              queryProvinces();
                          }else if("city".equals(type)){
                              queryCities();
                          }else if("county".equals(type)){
                              queryCounties();
                          }
                      }
                  });
              }
            }

        });
    }



    private void showProgressDialog() {
        if(progressDialog == null){
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }
    private void closeProgressDialog() {

        if(progressDialog != null){
            progressDialog.dismiss();
        }
    }

}


